An estimated 2 million Android users have now fallen victim to malware mistakenly downloaded from Google Play, which was initially reported to have affected approximately 600,000 users.

The malware, dubbed FalseGuide, was hidden in more than 40 guide apps for games, the oldest of which was uploaded to Google Play as early as November last year, security researchers from Check Point said.

"Since April 24, when the article below was first published, Check Point researchers learned that the FalseGuide attack is far more extensive than originally understood," Check Point said.